Fig. 5: Humidity sensor performance.
From: Fully biodegradable printed electronic sensors based on biomass-derived graphene inks and agripapers
a Relative resistance change (R/R0) for humidity variations from 35% RH to 85% RH; inset: photograph of the humidity sensor. b Humidity sensitivity curve averaged from six independently printed sensors (error bars represent standard deviation). c Response and recovery time analysis based on sensor response to an exhaled breath. d R/R0 for continuous 20-min humidity cycles between 35% RH and 65% RH. e R/R0 of the sensor (black) as the temperature is varied between 10 °C and 40 °C (orange). Chamber humidity was held constant at 50% RH, but fluctuated upon each temperature change as independently monitored with a commercial humidity meter (teal). f Breathing detection for fast and slow breathing rates.
